What is the number has a ones digit that is half the tens digit. The tens digit is a 8. The hundreds digit is twice the ones digit. The thousands digit is 1 less than the tens digit. What is the numbe?

Let's break down the clues: The tens digit is 8, so the ones digit, which is half of the tens digit, is 4. The hundreds digit, being twice the ones digit, is 8. Finally, the thousands digit is 1 less than the tens digit, which makes it 7. Therefore, the number is 7848.